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Selective determination of trace uranium by stripping voltammetry following adsorptive accumulation of the uranium—cupferron complex

✍ Scribed by Joseph Wang; Rossi Setiadji

Publisher
Elsevier Science
Year
1992
Tongue
English
Weight
547 KB
Volume
264
Category
Article
ISSN
0003-2670

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✦ Synopsis

Trace levels of uramum can be determmed by stnppmg voltammetry after controlled adsorptive preconcentratlon of the uranmm-cupferron complex on the mercury electrode The resulting procedure greatly Improves the selectwlty over previously reported adsorptive stnppmg schemes, whde offermg smular (subnanomolar) detectlon llrmts In addltron, the use of cupferron ehmmates mterference from dissolved oxygen, extends the hnear range, and offers a wider useful pH range Both potentlometnc and voltammetnc stnppmg approaches are used to follow the reduction of the adsorbed complex. The effect of vanous expenmental parameters IS explored Adaptation to flow-through cells permits on-line momtormg of trace levels of uranium at rates of 30-60 samples h-l, with relatnre standard dewatlons of 2 7-4 1% Apphcabdlty to the quanhtatlon of uramum m ground water samples IS demonstrated

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